Error with AINPC-Plugin

[ajaekel]

Plugin: AINPC
Link: https://www.blackspigot.com/downloads/ai-npc-1-8-1-19-make-npcs-talk-using-chatgpt.29123/

Problem:
I am using Citizens v2.0.30-SNAPSHOT (build 2960) on my 1.19.3 Spigot Server with de AINPC 2.0 Plugin. I also got an API-Key from https://beta.openai.com/account/api-keys.

While starting the server, the plugin seems to load correctly and I also can use the command /AINPC to create a prompt for an NPC. But whenever I try to start a conversation by left/right-clicking the NPC, I get an error on the server:

[14:26:39] [Server thread/ERROR]: Could not pass event NPCRightClickEvent to Citizens v2.0.30-SNAPSHOT (build 2960)
org.bukkit.event.EventException: null
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:310) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at net.citizensnpcs.EventListen.onPlayerInteractEntity(EventListen.java:438) ~[?:?]
        at jdk.internal.reflect.GeneratedMethodAccessor214.invoke(Unknown Source) ~[?:?]
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
        at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:70) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:589) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:576) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]
        at net.minecraft.server.network.PlayerConnection$4.performInteraction(PlayerConnection.java:2410) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.network.PlayerConnection$4.a(PlayerConnection.java:2457) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.network.protocol.game.PacketPlayInUseEntity$d.a(SourceFile:116) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.network.protocol.game.PacketPlayInUseEntity.a(SourceFile:66) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.network.PlayerConnection.a(PlayerConnection.java:2399) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.network.protocol.game.PacketPlayInUseEntity.a(SourceFile:53) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.network.protocol.game.PacketPlayInUseEntity.a(SourceFile:13) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.network.protocol.PlayerConnectionUtils.lambda$0(PlayerConnectionUtils.java:31) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.TickTask.run(SourceFile:18) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.util.thread.IAsyncTaskHandler.d(SourceFile:156) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.util.thread.IAsyncTaskHandlerReentrant.d(SourceFile:23) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1154) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.MinecraftServer.d(MinecraftServer.java:1) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.util.thread.IAsyncTaskHandler.x(SourceFile:130) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.MinecraftServer.bh(MinecraftServer.java:1133) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1126) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.util.thread.IAsyncTaskHandler.c(SourceFile:139) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.MinecraftServer.i_(MinecraftServer.java:1110) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1021) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at net.minecraft.server.MinecraftServer.lambda$0(MinecraftServer.java:301) ~[spigot-1.19.3-R0.1-SNAPSHOT.jar:3669-Spigot-454acb7-f150cfb]
        at java.lang.Thread.run(Thread.java:833) ~[?:?]
Caused by: java.lang.NullPointerException: npc.getTraitNullable(AITrait::class.java) must not be null
        at gg.stephen.ainpc.npc.AITrait.process(AITrait.kt:57) ~[?:?]
        at gg.stephen.ainpc.npc.AITrait.rightClick(AITrait.kt:43) ~[?:?]
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:?]
        at jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[?:?]
        at jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:?]
        at java.lang.reflect.Method.invoke(Method.java:568) ~[?:?]
        at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:306) ~[spigot-api-1.19.3-R0.1-SNAPSHOT.jar:?]